• J E Caldwell, P C Canfell, K P Castagnoli, D P Lynam, M R Fahey, D M Fisher, and R D Miller.
• Department of Anesthesia, University of California San Francisco 94143-0648.
• Anesthesiology. 1989 Jan 1; 70 (1): 7-12.

AbstractThe authors determined the pharmacokinetics and duration of action of a bolus dose of pipecuronium bromide (0.07 mg.kg-1) in 40 patients anesthetized with halothane and nitrous oxide. Twenty were patients with normal renal function, undergoing a variety of surgical procedures, and 20 were undergoing cadaver renal transplantation because of end-stage renal disease. Plasma concentrations of pipecuronium were measured for 6 h after administration using a sensitive and specific capillary gas chromatographic assay. Plasma concentration versus time data were analyzed by nonlinear regression and fit to a two-compartment or three-compartment model; in addition, the data were analyzed by a non-compartmental method based on statistical moments. Neuromuscular blockade was assessed by measuring the mechanical evoked response of the adductor pollicis muscle to train-of-four stimulation of the ulnar nerve. The pharmacokinetic parameters derived by compartmental modelling were (normal vs. renal failure, respectively): volume of distribution at steady state (309 +/- 103 vs. 442 +/- 158 ml.kg-1, mean +/- SD), plasma clearance, (2.4 +/- 0.6 vs. 1.6 +/- 0.6 ml.kg-1.min-1), mean residence time (140 +/- 63 vs. 329 +/- 198 min), and elimination half-life (137 +/- 68 vs. 263 +/- 168 min). The same parameters as derived by the non-compartmental method were (normal vs. renal failure, respectively): volume of distribution at steady state (307 +/- 80 vs. 426 +/- 119 ml.kg-1, mean +/- SD), plasma clearance (2.4 +/- 0.6 vs. 1.6 +/- 0.6 ml.kg-1.min-1), mean residence time (134 +/- 41 vs. 323 +/- 228 min), and elimination half-life (118 +/- 35 vs. 247 +/- 168 min).(ABSTRACT TRUNCATED AT 250 WORDS)

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